1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* rxrpc network namespace handling. 3 * 4 * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/proc_fs.h> 9 #include "ar-internal.h" 10 11 unsigned int rxrpc_net_id; 12 13 static void rxrpc_client_conn_reap_timeout(struct timer_list *timer) 14 { 15 struct rxrpc_net *rxnet = 16 container_of(timer, struct rxrpc_net, client_conn_reap_timer); 17 18 if (rxnet->live) 19 rxrpc_queue_work(&rxnet->client_conn_reaper); 20 } 21 22 static void rxrpc_service_conn_reap_timeout(struct timer_list *timer) 23 { 24 struct rxrpc_net *rxnet = 25 container_of(timer, struct rxrpc_net, service_conn_reap_timer); 26 27 if (rxnet->live) 28 rxrpc_queue_work(&rxnet->service_conn_reaper); 29 } 30 31 static void rxrpc_peer_keepalive_timeout(struct timer_list *timer) 32 { 33 struct rxrpc_net *rxnet = 34 container_of(timer, struct rxrpc_net, peer_keepalive_timer); 35 36 if (rxnet->live) 37 rxrpc_queue_work(&rxnet->peer_keepalive_work); 38 } 39 40 /* 41 * Initialise a per-network namespace record. 42 */ 43 static __net_init int rxrpc_init_net(struct net *net) 44 { 45 struct rxrpc_net *rxnet = rxrpc_net(net); 46 int ret, i; 47 48 rxnet->live = true; 49 get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch)); 50 rxnet->epoch |= RXRPC_RANDOM_EPOCH; 51 52 INIT_LIST_HEAD(&rxnet->calls); 53 spin_lock_init(&rxnet->call_lock); 54 atomic_set(&rxnet->nr_calls, 1); 55 56 atomic_set(&rxnet->nr_conns, 1); 57 INIT_LIST_HEAD(&rxnet->conn_proc_list); 58 INIT_LIST_HEAD(&rxnet->service_conns); 59 rwlock_init(&rxnet->conn_lock); 60 INIT_WORK(&rxnet->service_conn_reaper, 61 rxrpc_service_connection_reaper); 62 timer_setup(&rxnet->service_conn_reap_timer, 63 rxrpc_service_conn_reap_timeout, 0); 64 65 atomic_set(&rxnet->nr_client_conns, 0); 66 rxnet->kill_all_client_conns = false; 67 spin_lock_init(&rxnet->client_conn_cache_lock); 68 spin_lock_init(&rxnet->client_conn_discard_lock); 69 INIT_LIST_HEAD(&rxnet->idle_client_conns); 70 INIT_WORK(&rxnet->client_conn_reaper, 71 rxrpc_discard_expired_client_conns); 72 timer_setup(&rxnet->client_conn_reap_timer, 73 rxrpc_client_conn_reap_timeout, 0); 74 75 INIT_HLIST_HEAD(&rxnet->local_endpoints); 76 mutex_init(&rxnet->local_mutex); 77 78 hash_init(rxnet->peer_hash); 79 spin_lock_init(&rxnet->peer_hash_lock); 80 for (i = 0; i < ARRAY_SIZE(rxnet->peer_keepalive); i++) 81 INIT_LIST_HEAD(&rxnet->peer_keepalive[i]); 82 INIT_LIST_HEAD(&rxnet->peer_keepalive_new); 83 timer_setup(&rxnet->peer_keepalive_timer, 84 rxrpc_peer_keepalive_timeout, 0); 85 INIT_WORK(&rxnet->peer_keepalive_work, rxrpc_peer_keepalive_worker); 86 rxnet->peer_keepalive_base = ktime_get_seconds(); 87 88 ret = -ENOMEM; 89 rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net); 90 if (!rxnet->proc_net) 91 goto err_proc; 92 93 proc_create_net("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_ops, 94 sizeof(struct seq_net_private)); 95 proc_create_net("conns", 0444, rxnet->proc_net, 96 &rxrpc_connection_seq_ops, 97 sizeof(struct seq_net_private)); 98 proc_create_net("peers", 0444, rxnet->proc_net, 99 &rxrpc_peer_seq_ops, 100 sizeof(struct seq_net_private)); 101 proc_create_net("locals", 0444, rxnet->proc_net, 102 &rxrpc_local_seq_ops, 103 sizeof(struct seq_net_private)); 104 return 0; 105 106 err_proc: 107 rxnet->live = false; 108 return ret; 109 } 110 111 /* 112 * Clean up a per-network namespace record. 113 */ 114 static __net_exit void rxrpc_exit_net(struct net *net) 115 { 116 struct rxrpc_net *rxnet = rxrpc_net(net); 117 118 rxnet->live = false; 119 del_timer_sync(&rxnet->peer_keepalive_timer); 120 cancel_work_sync(&rxnet->peer_keepalive_work); 121 /* Remove the timer again as the worker may have restarted it. */ 122 del_timer_sync(&rxnet->peer_keepalive_timer); 123 rxrpc_destroy_all_calls(rxnet); 124 rxrpc_destroy_all_connections(rxnet); 125 rxrpc_destroy_all_peers(rxnet); 126 rxrpc_destroy_all_locals(rxnet); 127 proc_remove(rxnet->proc_net); 128 } 129 130 struct pernet_operations rxrpc_net_ops = { 131 .init = rxrpc_init_net, 132 .exit = rxrpc_exit_net, 133 .id = &rxrpc_net_id, 134 .size = sizeof(struct rxrpc_net), 135 }; 136